Self-coupling transformer starting device of high-voltage motor

Abstract

The utility model relates to the technical field of electric connecting pieces, in particular to an autotransformer starting device of a high-voltage motor. According to the technical scheme, the plug comprises a plug body, a pull ring, a movable plate and a volute spiral spring, installation grooves are symmetrically formed in the two faces of the plug body, the movable plate is rotationally installed on the installation grooves, and the movable plate is elastically connected with the installation grooves through the volute spiral spring. According to the utility model, through the cooperation of the structures and the design that the surface of the plug is deformable in the use process, a person can conveniently apply force to pull out the plug, and meanwhile, the deformation position of the surface of the plug can be automatically reset under the action of elastic force, so that the accumulation of dust can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric connectors, in particular to a high-voltage motor autotransformer starting device. Background Art

[0002] The "coupling" in autotransformer means electromagnetic coupling. Ordinary transformers transfer energy through electromagnetic coupling of the primary and secondary coils. There is no direct electrical connection between the primary and secondary sides. The autotransformer has a direct electrical connection between the primary and secondary sides, and its low-voltage coil is part of the high-voltage coil.

[0003] High-voltage motors refer to motors with a rated voltage of more than 1000V. High-voltage motors are produced because the motor power is proportional to the product of voltage and current. Therefore, when the power of low-voltage motors increases to a certain level (such as 300KW / 380V), the current is limited by the allowable bearing capacity of the wire and it is difficult to increase, or the cost is too high. It is necessary to increase the voltage to achieve high power output. The advantages of high-voltage motors are high power and strong impact resistance; the disadvantages are large inertia, and it is difficult to start and brake.

[0004] Due to its high power, the high-voltage motor has a large and thick starting power plug. When the high-voltage motor is started by autotransformer, there is great friction between the starting power plug and the socket. The plug structure currently on the market is not convenient for personnel to apply force during use, resulting in difficulty for personnel to smoothly unplug the plug during normal plugging and unplugging.

[0005] For this reason, we propose a high-voltage motor autotransformer starting device to solve the existing problems. Utility Model Content

[0006] The utility model aims to solve the problems existing in the background technology and proposes a high-voltage motor autotransformer starting device.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-voltage motor autotransformer starting device, comprising:

[0008] A plug, a pull ring, a movable plate and a spiral spring. The two sides of the plug are symmetrically provided with mounting grooves, a movable plate is rotatably mounted on the mounting groove, and the movable plate is elastically connected to the mounting groove through the spiral spring.

[0009] Preferably, a base is installed at the tail of the plug, and a power cord is fixed on the base;

[0010] Three pins are equidistantly mounted on the end surface of the plug.

[0011] Preferably, a positioning groove adapted to the pull ring is provided on the upper surface of the plug, and a sleeve is fixed on the positioning groove;

[0012] The pull ring is plugged into the sleeve.

[0013] Preferably, pin grooves are symmetrically provided inside the installation groove;

[0014] A shaft rod is symmetrically welded at one end of the movable plate, and the shaft rod is rotatably inserted into the pin groove;

[0015] A scroll spring is fixed on the shaft, and the other end of the scroll spring is fixed to the inner wall of the pin groove;

[0016] The outer surface of the movable plate is provided with anti-slip grooves at equal intervals.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] During the use of the high-voltage motor autotransformer starting device of the utility model, when it is necessary to unplug the plug of the high-voltage motor autotransformer starting device from the socket, the personnel can deflect the movable plate by pressing the fingers, so that one end of the movable plate enters the installation groove inwardly, and the personnel's fingers enter the installation groove and press against the movable plate, and then apply force outward to unplug the plug;

[0019] When the movable plate deflects, the movable plate drives the shaft to rotate, so that the shaft and the scroll spring are deformed. When the movable plate loses the pressure of the personnel, the movable plate automatically resets under the elastic force of the scroll spring to cover the installation slot, thereby preventing dust from entering the installation slot.

[0020] During use, the utility model is designed so that the surface of the plug can be deformed, so that it is convenient for a person to apply force to unplug the plug. At the same time, the deformed position of the surface of the plug can be automatically reset under the action of elastic force, so that dust accumulation can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the movable plate installation of the utility model;

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the movable plate installation of the utility model.

[0025] Reference numerals:

[0026] 1. Plug; 2. Plug pin; 3. Power cord; 4. Positioning slot; 5. Sleeve; 7. Movable plate; 8. Anti-slip pattern; 9. Volute spring; 10. Shaft; 11. Mounting slot. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Embodiment 1

[0029] like Figure 1-Figure 4 As shown, the utility model proposes a high-voltage motor autotransformer starting device, comprising:

[0030] The plug 1, the pull ring 6, the movable plate 7 and the spiral spring 9, the two sides of the plug 1 are symmetrically provided with mounting grooves 11, the movable plate 7 is rotatably mounted on the mounting groove 11, and the movable plate 7 is elastically connected to the mounting groove 11 through the spiral spring 9.

[0031] Based on Example 1:

[0032] During the use of the high-voltage motor autotransformer starting device of the utility model, when it is necessary to unplug the plug 1 used for the high-voltage motor autotransformer starting from the socket, the personnel can press the movable plate 7 with their fingers to deflect the movable plate 7 so that one end of the movable plate 7 enters the installation groove 11 inwardly. At this time, the personnel's fingers enter the installation groove 11 and press against the movable plate 7, and then apply force outward to unplug the plug 1;

[0033] When the movable plate 7 produces a deflection action, the movable plate 7 drives the shaft 10 to rotate, so that the shaft 10 and the spiral spring 9 are deformed. When the movable plate 7 loses the pressure of the person, the movable plate 7 automatically resets under the elastic force of the spiral spring 9, and blocks the installation groove 11, thereby preventing dust from entering the installation groove 11.

[0034] Embodiment 2

[0035] like Figure 1-Figure 4 As shown, the utility model proposes a high-voltage motor autotransformer starting device. Compared with the first embodiment, this embodiment further includes: a base is installed at the tail of the plug 1, and a power cord 3 is fixed on the base;

[0036] Three pins 2 are equidistantly mounted on the end surface of the plug 1;

[0037] The above structure is the basic component unit of the plug 1.

[0038] The upper surface of the plug 1 is provided with a positioning groove 4 adapted to the pull ring 6, and a sleeve 5 is fixed on the positioning groove 4;

[0039] The pull ring 6 is plugged into the sleeve 5;

[0040] Through the cooperation of the above structure, when necessary, the pull ring 6 can be pulled out, and then the person can insert another finger into the pull ring 6 to cooperate with the pulling action to assist the plugging and unplugging operation of the plug 1.

[0041] The interior of the mounting groove 11 is symmetrically provided with pin grooves;

[0042] A shaft rod 10 is symmetrically welded to one end of the movable plate 7, and the shaft rod 10 is rotatably inserted into the pin groove;

[0043] A scroll spring 9 is fixed on the shaft 10, and the other end of the scroll spring 9 is fixed to the inner wall of the pin groove;

[0044] The outer surface of the movable plate 7 is provided with anti-slip grooves 8 at equal intervals;

[0045] When the movable plate 7 generates a deflection action, the movable plate 7 drives the shaft 10 to rotate, so that the shaft 10 and the spiral spring 9 are deformed.

[0046] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

[0047] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A high-voltage motor autotransformer starting device, comprising a plug (1), a pull ring (6), a movable plate (7) and a volute spring (9), characterized in that: The plug (1) has mounting grooves (11) symmetrically formed on both sides, a movable plate (7) is rotatably mounted on the mounting groove (11), and the movable plate (7) is elastically connected to the mounting groove (11) via a spiral spring (9).

2. A high voltage motor autotransformer starting device according to claim 1, characterized in that: A base is installed at the rear of the plug (1), and a power cord (3) is fixed on the base; Three plug pins (2) are equidistantly mounted on the end surface of the plug (1).

3. A high voltage motor autotransformer starting device according to claim 1, characterized in that: The upper surface of the plug (1) is provided with a positioning groove (4) adapted to the pull ring (6), and a sleeve (5) is fixed on the positioning groove (4); The pull ring (6) is plugged onto the sleeve (5).

4. A high voltage motor autotransformer starting device according to claim 1, characterized in that: The interior of the installation groove (11) is symmetrically provided with pin grooves; A shaft rod (10) is symmetrically welded to one end of the movable plate (7), and the shaft rod (10) is rotatably inserted into the pin groove; A scroll spring (9) is fixed on the shaft rod (10), and the other end of the scroll spring (9) is fixed on the inner wall of the pin groove; The outer surface of the movable plate (7) is provided with anti-slip grooves (8) at equal intervals.

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